Super mass transfer multiplier for preparing nanoscale iron oxide

Abstract

The utility model relates to the technical field of super mass transfer, and provides a super mass transfer multiplier for preparing nanoscale iron oxide, which comprises a mass transfer box body, the feeding pipe is arranged on the mass transfer box body and is provided with a feeding part, and the feeding part is positioned in the mass transfer box body; the plurality of packing layers are arranged in the mass transfer box body, and the mass transfer box body rotates relative to the packing layers; the multiple filler layers are located on the peripheral side of the feeding part and provided with pores, and the sizes of the pores are gradually reduced from the positions close to the feeding part to the positions away from the feeding part. According to the technical scheme, the problem that in the prior art, filler with a single pore diameter or a single form possibly cannot meet the efficient mass transfer requirement is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of super mass transfer, and specifically to a super mass transfer enhancer for preparing nano-level iron oxide. Background Art

[0002] Nano iron oxide has a wide range of applications in magnetic materials, catalysts, optoelectronic devices, biomedicine and other fields due to its unique physical and chemical properties. However, traditional preparation methods (such as wet and dry methods) face challenges in controlling particle size, morphology, dispersibility and purity. For example: Uneven particle size distribution: In conventional reaction systems, due to mass transfer limitations, inconsistent reaction rates may lead to a wide particle size distribution of the generated nanoparticles, affecting their application performance. Agglomeration problem: Nanoparticles are prone to agglomeration due to their high surface energy, making it difficult to maintain a dispersed state at the nanoscale in practical applications. Low reaction efficiency: The mass transfer process in traditional reactors is slow, especially for situations involving complex chemical reactions or solid-liquid and gas-liquid interface reactions. The reaction efficiency is limited, resulting in a long production cycle and high energy consumption.

[0003] The supergravity mass transfer enhancer used to prepare nano-sized iron oxide is a special device that uses a supergravity field to enhance the mass transfer process. It is designed to improve the mixing efficiency, mass transfer performance and reaction uniformity in the synthesis of nano-sized iron oxide, thereby achieving the preparation of nano-sized iron oxide with high purity, uniform particle size and excellent performance. The supergravity mass transfer enhancer is usually based on centrifugal rotation technology, which significantly accelerates the material migration and mixing process by creating a supergravity environment that is much greater than conventional gravity.

[0004] Among them, fillers are key components in mass transfer and reaction engineering, and their structure and properties directly affect fluid flow, mass transfer efficiency, and reaction progress. Traditional filler design usually focuses on a single pore size or a single morphology, aiming to provide a larger specific surface area to enhance mass transfer. However, for preparation processes such as nano-iron oxide that require fine control of reaction conditions and product characteristics, fillers with a single pore structure may not be able to meet the needs of efficient mass transfer. Utility Model Content

[0005] The utility model provides a super mass transfer enhancer for preparing nano-sized iron oxide, which solves the problem in the related art that a filler with a single pore size or a single form may not meet the demand for efficient mass transfer.

[0006] The technical solution of the utility model is as follows: a super mass transfer enhancer for preparing nano-scale iron oxide, comprising: a mass transfer box, which is rotatably arranged; a feed pipe, which is arranged on the mass transfer box and has a feed part, and the feed part is located in the mass transfer box; a plurality of packing layers, which are arranged in the mass transfer box, and the mass transfer box rotates relative to the packing layers; a plurality of packing layers are located on the peripheral side of the feed part, and the packing layers have pores, and the size of the pores gradually decreases from close to the feed part to far away from the feed part.

[0007] Optionally, the pores are randomly and evenly distributed, and include at least two pores of different shapes.

[0008] Optionally, the packing layer is three layers, namely a first packing layer, a second packing layer and a third packing layer;

[0009] The first packing layer is arranged on the peripheral side of the feeding part, the second packing layer is detachably sleeved on the first packing layer, and the third packing layer is detachably sleeved on the second packing layer;

[0010] The first packing layer has first pores, the second packing layer has second pores, and the third packing layer has third pores. The sizes of the first pores, the second pores, and the third pores decrease in sequence.

[0011] Optionally, it is characterized in that the outer walls of the first packing layer, the second packing layer and the third packing layer all have arc-shaped protrusions.

[0012] Optionally, it further comprises a rotating shaft, the rotating shaft is rotatably arranged, and the mass transfer box is arranged on the rotating shaft;

[0013] A driving member drives the rotating shaft to rotate.

[0014] Optionally, a collecting ring is further included, wherein the collecting ring is sleeved on the outside of the third packing layer, and a collecting space is formed between the collecting ring and the third packing layer.

[0015] Optionally, it also includes:

[0016] A spiral guideway, wherein the spiral guideway is arranged in the collecting space, and the third aperture faces the spiral guideway;

[0017] A collecting box is arranged in the collecting space, and the lower end of the spiral guideway faces the inside of the collecting box.

[0018] Optionally, a soundproof cover is further included, and the soundproof cover is sleeved on the outside of the collecting ring.

[0019] Optionally, the feeding part is an atomizing nozzle.

[0020] Optionally, the driving member is a driving motor.

[0021] The working principle and beneficial effects of the utility model are:

[0022] In the utility model, by setting several layers of packing layers, and the pore size of each layer gradually decreases from the peripheral side of the feed part to the direction away from the feed part, the graded mass transfer and graded reaction of the fluid in the packing layer are realized. This design is conducive to gradually optimizing the reaction conditions, so that the reactants experience different mass transfer rates and reaction environments at different stages, which is conducive to controlling the particle size distribution and morphology of nano iron oxide, and improving the uniformity and controllability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0024] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the mass transfer box of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the first packing layer, the second packing layer and the third packing layer of the utility model;

[0027] Figure 4 This is a schematic diagram of the collecting ring and spiral guide structure of the utility model;

[0028] In the figure: 1. mass transfer box; 2. feed pipe; 201. feed part; 3. packing layer; 301. first packing layer; 302. second packing layer; 303. third packing layer; 304. arc-shaped protrusion; 4. pore; 401. first pore; 402. second pore; 403. third pore; 5. rotating shaft; 6. driving member; 7. collecting ring; 8. collecting space; 9. spiral guide; 10. collecting box; 11. sound insulation cover; 12. atomizing nozzle. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0030] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0031] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0033] Reference Figure 1~Figure 4 A super mass transfer enhancer for preparing nano-sized iron oxide is proposed, comprising: a mass transfer box 1, which is rotatably arranged; a feed pipe 2, which is arranged on the mass transfer box 1 and has a feed part 201, and the feed part 201 is located in the mass transfer box 1; a plurality of packing layers 3, which are arranged in the mass transfer box 1, and the mass transfer box 1 rotates relative to the packing layers 3; a plurality of packing layers 3 are located around the feed part 201, and the packing layers 3 have pores 4, and the size of the pores 4 gradually decreases from close to the feed part 201 to far away from the feed part 201.

[0034] In this embodiment, the mass transfer box 1 can be made of high-strength, corrosion-resistant materials and can be cylindrical. Both ends of the mass transfer box 1 can be provided with sealed end covers, and the interior is a cavity structure. The mass transfer box 1 can be supported and driven to rotate at a certain speed by bearings and driving devices (such as motors, reducers, etc.). The feed pipe 2 is arranged on the mass transfer box 1, and one end of the feed pipe 2 extends outside the box for connecting to an external feeding system; the other end is provided with a feed part 201, which penetrates into the inner cavity of the mass transfer box 1. The feed part 201 can be designed with a nozzle or a distributor to ensure that the raw material liquid can be evenly and quickly distributed to the packing layer 3 during feeding. In the inner cavity of the mass transfer box 1, several layers of packing layers 3 are arranged in sequence along the radial direction. Starting from the first layer of packing layer 3 close to the feed part 201, the size of the pores 4 of each layer of packing sheets gradually decreases, forming a pore 4 gradient from large to small. The packing layer 3 and the mass transfer box 1 may be connected via a bearing or a sliding support structure, so that the mass transfer box 1 can rotate relative to the packing layer 3, that is, while the mass transfer box 1 rotates, the packing layer 3 does not rotate with it.

[0035] Specifically, the raw material liquid containing the iron source, the reducing agent, the stabilizer and other ingredients can be fed into the mass transfer box 1 through the feed pipe 2. The raw material liquid can be evenly sprayed onto the first packing layer 3 closest to the feed part 201 under the action of the nozzle or distributor of the feed part 201. The mass transfer box 1 starts to rotate under the drive of the driving device, generating a strong centrifugal force. Under the action of the centrifugal force, the raw material liquid forms a high-speed rotating liquid film or droplets on the packing layer 3 to achieve efficient mass transfer. As the liquid film or droplets flow between the packing layers 3, the iron source is reduced to a low-valent state or a zero-valent state under the action of the reducing agent, and then oxidized to form nano-scale iron oxide particles. As the size of the pores 4 of the packing layer 3 gradually decreases, from the first layer to the last layer, the mass transfer rate and reaction conditions are gradually optimized, which is conducive to controlling the particle size distribution and morphology of nano-iron oxide. The super mass transfer enhancer provided in this embodiment realizes efficient mass transfer, graded reaction and precise control of nano iron oxide particles of the raw material liquid in the packing layer 3 by setting a rotating mass transfer box 1, a feed pipe 2 and a packing layer 3 with a pore 4 gradient, which helps to improve the preparation efficiency and product quality of nano iron oxide.

[0036] Furthermore, the pores 4 are randomly and evenly distributed, and include at least two pores 4 of different shapes.

[0037] In this embodiment, the pores 4 of each packing layer 3 are no longer limited to a single shape or regular arrangement, but are randomly and evenly distributed. This design is intended to increase the connectivity between the pores 4 and improve the mass transfer efficiency. At the same time, the randomly distributed pores 4 help to form a complex flow field, enhance the mixing and shearing inside the fluid, and are conducive to the uniform dispersion of nano iron oxide particles.

[0038] In each packing layer 3, the pores 4 include at least two different shapes. For example, circular pores, rectangular pores, triangular pores, irregular pores, etc. can be included at the same time. Pores 4 of different shapes can provide different fluid flow paths and flow velocity distributions, which is conducive to forming a richer and more efficient mass transfer environment.

[0039] Furthermore, the packing layer 3 has three layers, namely a first packing layer 301, a second packing layer 302 and a third packing layer 303; the first packing layer 301 is arranged on the peripheral side of the feed part 201, the second packing layer 302 is detachably mounted on the first packing layer 301, and the third packing layer 303 is detachably mounted on the second packing layer 302; the first packing layer 301 has a first pore 401, the second packing layer 302 has a second pore 402, and the third packing layer 303 has a third pore 403, and the sizes of the first pore 401, the second pore 402 and the third pore 403 decrease successively.

[0040] In this embodiment, the packing layer 3 is clearly designed to be three layers, namely the first packing layer 301, the second packing layer 302 and the third packing layer 303. The first packing layer 301 is located on the side of the feed part 201 and directly receives the raw material liquid sprayed from the feed pipe 2. The second packing layer 302 is detachably mounted on the first packing layer 301, and the third packing layer 303 is also detachably mounted on the second packing layer 302 to form a stacked structure. Each packing layer 3 has pores 4 of different sizes, the first packing layer 301 has a first pore 401, the second packing layer 302 has a second pore 402, and the third packing layer 303 has a third pore 403, and the size of the pore 4 decreases from the first layer to the third layer. This design follows the concept of graded mass transfer and graded reaction, so that the raw material liquid undergoes a mass transfer process from fast to slow when passing through each layer of the packing layer 3, which is conducive to controlling the particle size distribution and morphology of nano iron oxide.

[0041] The second packing layer 302 and the third packing layer 303 are detachably mounted on the first packing layer 301 and the second packing layer 302, respectively. This design facilitates the replacement or adjustment of packing layers 3 with different pore 4 sizes as needed during use to adapt to different preparation process requirements or to cope with the wear of the packing layer 3. At the same time, the detachable design is also conducive to the cleaning, maintenance and replacement of the packing layer 3. By means of three layers of detachable packing layers 3 with decreasing pore 4 sizes, more sophisticated mass transfer control and reaction condition adjustment are achieved, further improving the flexibility and pertinence of the preparation of nano-iron oxide. The super mass transfer enhancer provided in this embodiment provides a more sophisticated and adjustable mass transfer environment by setting three layers of detachable packing layers 3 with decreasing pore 4 sizes, thereby improving the flexibility and pertinence of the preparation of nano-iron oxide and facilitating the maintenance of the equipment and the replacement of the packing layer 3.

[0042] Furthermore, the outer walls of the first packing layer 301 , the second packing layer 302 and the third packing layer 303 all have arc-shaped protrusions 304 .

[0043] In the present embodiment, these protrusions are evenly distributed along the circumference of the packing layer 3, and the shapes can be semicircular, elliptical, parabolic, etc., in order to increase the surface area of ​​the outer wall of the packing layer 3 and provide more mass transfer contact points. The presence of the arc-shaped protrusion 304 allows the fluid to transfer mass not only in the internal pores 4 of the packing layer 3, but also on the contact surface between the outer wall of the packing layer 3 and the fluid when flowing between the packing layers 3. The additional mass transfer area provided by the protrusion helps to improve the mass transfer efficiency, especially when the fluid flow rate is high or the spacing between the packing layers 3 is small, the effect of the protrusion is particularly significant. The presence of the arc-shaped protrusion 304 can also disturb the flow state of the fluid, generate local eddy currents and shear forces, enhance the mixing inside the fluid, and is conducive to the uniform dispersion and stable suspension of the nano-iron oxide particles.

[0044] Furthermore, it also includes a rotating shaft 5, which is rotatably arranged and the mass transfer box 1 is arranged on the rotating shaft 5; and a driving member 6, which drives the rotating shaft 5 to rotate.

[0045] In this embodiment, a special driving member 6 is provided, such as a motor, a hydraulic motor, a pneumatic motor, etc., for driving the rotating shaft 5 to rotate. The driving member 6 is connected to the rotating shaft 5 through a transmission mechanism such as a coupling, a pulley, and a gear, and transmits power to the rotating shaft 5, thereby driving the mass transfer box 1 to rotate.

[0046] Furthermore, it also includes a collecting ring 7, which is sleeved on the outside of the third packing layer 303, and a collecting space 8 is between the collecting ring 7 and the third packing layer 303.

[0047] In this embodiment, a collecting ring 7 is added to the outside of the third packing layer 303, and the collecting ring 7 is coaxially arranged with the third packing layer 303, and is detachably sleeved on the outside of the third packing layer 303 through a suitable connection structure (such as a flange, a buckle, etc.). An annular collecting space 8 is formed between the collecting ring 7 and the third packing layer 303. The collecting space 8 serves as a temporary storage area for nano-scale iron oxide products, and is used to accommodate the reaction liquid containing nano-iron oxide after being treated by the three-layer packing layer 3. When the reaction liquid passes through the third packing layer 303 under the action of centrifugal force, it will be collected in the collecting space 8. A discharge port is provided at the bottom or side of the collecting space 8, which is connected to subsequent collection, separation, purification and other equipment. After the reaction liquid accumulates to a certain amount in the collecting space 8, it is discharged through the discharge port and enters the subsequent process for collection and post-processing of the nano-iron oxide product.

[0048] Furthermore, it also includes: a spiral guide channel 9, which is arranged in the collection space 8, and the third pore 403 faces the spiral guide channel 9; and a collection box 10, which is arranged in the collection space 8, and the lower end of the spiral guide channel 9 faces the collection box 10.

[0049] In this embodiment, a spiral guide channel 9 is added inside the collection space 8, and the guide channel extends downward along the circumferential spiral of the collection space 8. After passing through the third packing layer 303, the reaction liquid flows downward along the spiral guide channel 9 to form a spiral flow channel, which is conducive to prolonging the residence time of the reaction liquid in the collection space 8 and further promoting mass transfer and mixing. A collection box 10 is arranged at the bottom or side of the collection space 8, and the collection box 10 is connected to the lower end of the spiral guide channel 9 to form a closed receiving area. The lower end opening of the spiral guide channel 9 faces the collection box 10, so that the reaction liquid finally enters the collection box 10 after the spiral flow and is concentrated. A discharge port is provided at the bottom or side of the collection box 10, which is connected to subsequent collection, separation, purification and other equipment. After the reaction liquid accumulates to a certain amount in the collection box 10, it is discharged through the discharge port and enters the subsequent process for collection and post-processing of the nano iron oxide product.

[0050] Furthermore, it also includes a sound insulation cover 11, which is sleeved on the outside of the collecting ring 7.

[0051] In this embodiment, a soundproof cover 11 is added to the outside of the collection ring 7. The soundproof cover 11 is arranged around the outer circumference of the collection ring 7 to form a closed or semi-closed space, which wraps the collection ring 7 and the internal components. The soundproof cover 11 can be made of sound-absorbing materials, such as soundproof cotton, soundproof panels, etc., or a sound-absorbing structure such as sound-absorbing sponge and sound-absorbing holes is provided inside. The design of the soundproof cover 11 is intended to reduce the noise generated by the supermass transfer enhancer during operation, especially the noise caused by the high-speed rotation of the shaft 5, the high-speed flow of the fluid, and the operation of the mechanical parts inside the equipment. The soundproof cover 11 can absorb and block the propagation of sound, reduce the impact of the equipment on the external environment, and improve the safety and comfort of the workplace.

[0052] Furthermore, the feeding part 201 is an atomizing nozzle 12 .

[0053] In this embodiment, the feed part 201 is designed with an atomizing nozzle 12, and the atomizing nozzle 12 is installed at the end of the feed pipe 2 and penetrates into the mass transfer box 1. A fine nozzle structure is provided inside the atomizing nozzle 12, such as a micro-hole nozzle, a swirl nozzle, a gas-liquid mixing nozzle, etc., which can atomize the raw material liquid into fine droplets. The raw material liquid is atomized into tiny droplets under the action of the atomizing nozzle 12, and the droplet diameter is usually between tens of microns and hundreds of microns, or even smaller. The atomized droplets have a large specific surface area and can quickly contact the gas or the existing liquid film in the mass transfer box 1, greatly improving the mass transfer efficiency and reaction rate. By adjusting the structural parameters of the atomizing nozzle 12 (such as nozzle aperture, injection angle, gas auxiliary pressure, etc.) and operating conditions (such as raw material liquid pressure, temperature, flow, etc.), the particle size distribution of the atomized droplets can be accurately controlled, which is very important for preparing nano-scale iron oxide with uniform particle size and narrow distribution.

[0054] Furthermore, the driving member 6 is a driving motor.

[0055] In this embodiment, the driving member 6 uses a driving motor as a power source. The driving motor is usually an AC asynchronous motor, a DC motor, a servo motor, a variable frequency motor, etc., and has the characteristics of a wide speed regulation range, stable operation, and high control accuracy.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A super mass transfer enhancer for preparing nano-sized iron oxide, characterized in that: include: A mass transfer box (1), wherein the mass transfer box (1) is rotatably arranged; A feed pipe (2), the feed pipe (2) being arranged on the mass transfer box (1) and having a feed portion (201), the feed portion (201) being located inside the mass transfer box (1); A plurality of packing layers (3) are arranged in the mass transfer box (1), and the mass transfer box (1) rotates relative to the packing layers (3); the plurality of packing layers (3) are located around the feed portion (201), and the packing layers (3) have pores (4), and the size of the pores (4) gradually decreases from close to the feed portion (201) to far away from the feed portion (201).

2. A super mass transfer enhancer for preparing nano-sized iron oxide according to claim 1, characterized in that: The pores (4) are randomly and evenly distributed, and include at least two pores (4) of different shapes.

3. The super mass transfer enhancer for preparing nano-sized iron oxide according to claim 1, characterized in that: The packing layer (3) comprises three layers, namely a first packing layer (301), a second packing layer (302) and a third packing layer (303); The first packing layer (301) is arranged on the peripheral side of the feeding portion (201), the second packing layer (302) is detachably sleeved on the first packing layer (301), and the third packing layer (303) is detachably sleeved on the second packing layer (302); The first packing layer (301) has first pores (401), the second packing layer (302) has second pores (402), and the third packing layer (303) has third pores (403), and the sizes of the first pores (401), the second pores (402), and the third pores (403) decrease in sequence.

4. A super mass transfer enhancer for preparing nano-sized iron oxide according to claim 3, characterized in that: The outer walls of the first packing layer (301), the second packing layer (302) and the third packing layer (303) all have arc-shaped protrusions (304).

5. The super mass transfer enhancer for preparing nano-sized iron oxide according to claim 1, characterized in that: It also comprises a rotating shaft (5), the rotating shaft (5) is rotatably arranged, and the mass transfer box (1) is arranged on the rotating shaft (5); A driving member (6), wherein the driving member (6) drives the rotating shaft (5) to rotate.

6. The super mass transfer enhancer for preparing nano-sized iron oxide according to claim 3, characterized in that: It also comprises a collecting ring (7), wherein the collecting ring (7) is sleeved on the outside of the third packing layer (303), and a collecting space (8) is formed between the collecting ring (7) and the third packing layer (303).

7. A super mass transfer enhancer for preparing nano-sized iron oxide according to claim 6, characterized in that: Also includes: A spiral guide channel (9), wherein the spiral guide channel (9) is arranged in the collecting space (8), and the third pore (403) faces the spiral guide channel (9); A collection box (10), wherein the collection box (10) is arranged in the collection space (8), and the lower end of the spiral guide channel (9) faces the inside of the collection box (10).

8. The super mass transfer enhancer for preparing nano-sized iron oxide according to claim 6, characterized in that: It also comprises a soundproof cover (11), wherein the soundproof cover (11) is sleeved on the outside of the collecting ring (7).

9. The super mass transfer enhancer for preparing nano-sized iron oxide according to claim 1, characterized in that: The feeding part (201) is an atomizing nozzle (12).

10. The super mass transfer enhancer for preparing nano-sized iron oxide according to claim 5, characterized in that: The driving member (6) is a driving motor.

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